/* ===== POS SYSTEM - ONE DOLLAR SHOP ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #0a0a0a;
  --white: #ffffff;
  --gray-50: #f9f9f9;
  --gray-100: #f3f3f3;
  --gray-200: #e8e8e8;
  --gray-300: #d0d0d0;
  --gray-400: #a0a0a0;
  --gray-500: #6b6b6b;
  --gray-700: #333333;
  --accent: #111111;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --info: #2563eb;
  --sidebar-width: 240px;
  --topbar-height: 60px;
  --border-radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.05);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body { font-family: var(--font); background: var(--gray-100); color: var(--black); font-size: 14px; line-height: 1.5; }

/* ===== LAYOUT ===== */
.wrapper { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-width);
  background: var(--black);
  color: var(--white);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
  transition: width 0.25s ease;
}

.sidebar-header {
  padding: 24px 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-align: center;
}
.sidebar-logo { width: 60px; height: 60px; object-fit: cover; border-radius: 50%; border: 2px solid rgba(255,255,255,0.2); margin-bottom: 10px; }
.sidebar-icon { width: 60px; height: 60px; background: rgba(255,255,255,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 10px; font-size: 22px; }
.sidebar-header h2 { font-size: 14px; font-weight: 700; letter-spacing: 0.5px; }
.sidebar-sub { font-size: 11px; color: var(--gray-400); margin-top: 2px; letter-spacing: 1px; text-transform: uppercase; }

.sidebar-nav { padding: 12px 0; flex: 1; }
.nav-group-label { font-size: 10px; font-weight: 700; letter-spacing: 1.5px; color: var(--gray-500); padding: 14px 16px 6px; text-transform: uppercase; }

.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px; color: rgba(255,255,255,0.7);
  text-decoration: none; font-size: 13.5px; font-weight: 500;
  transition: all 0.15s; border-left: 3px solid transparent;
}
.nav-item:hover { color: var(--white); background: rgba(255,255,255,0.06); }
.nav-item.active { color: var(--white); background: rgba(255,255,255,0.1); border-left-color: var(--white); }
.nav-item i { width: 18px; text-align: center; font-size: 15px; }
.nav-logout { color: rgba(220,80,80,0.8) !important; margin-top: 8px; }
.nav-logout:hover { color: #ff6b6b !important; }

.main-content { margin-left: var(--sidebar-width); flex: 1; display: flex; flex-direction: column; min-height: 100vh; }

.topbar {
  height: var(--topbar-height); background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; position: sticky; top: 0; z-index: 50;
  box-shadow: var(--shadow);
}
.sidebar-toggle { background: none; border: 1px solid var(--gray-200); border-radius: var(--border-radius); padding: 6px 10px; cursor: pointer; color: var(--gray-700); font-size: 16px; }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.topbar-date, .topbar-admin { font-size: 13px; color: var(--gray-500); display: flex; align-items: center; gap: 6px; }
.topbar-admin { font-weight: 600; color: var(--black); }

.content-area { padding: 24px; flex: 1; }

/* Sidebar collapsed */
.wrapper.sidebar-collapsed .sidebar { width: 60px; }
.wrapper.sidebar-collapsed .sidebar-header h2,
.wrapper.sidebar-collapsed .sidebar-sub,
.wrapper.sidebar-collapsed .nav-group-label,
.wrapper.sidebar-collapsed .nav-item span { display: none; }
.wrapper.sidebar-collapsed .sidebar-header { padding: 16px 8px; }
.wrapper.sidebar-collapsed .nav-item { justify-content: center; padding: 12px 8px; }
.wrapper.sidebar-collapsed .main-content { margin-left: 60px; }

/* ===== PAGE HEADER ===== */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.page-header h1 { font-size: 22px; font-weight: 700; color: var(--black); }
.page-header p { font-size: 13px; color: var(--gray-500); margin-top: 2px; }
.breadcrumb { font-size: 12px; color: var(--gray-400); margin-bottom: 4px; }
.breadcrumb span { color: var(--black); font-weight: 500; }

/* ===== CARDS ===== */
.card { background: var(--white); border-radius: var(--border-radius); border: 1px solid var(--gray-200); box-shadow: var(--shadow); }
.card-header { padding: 16px 20px; border-bottom: 1px solid var(--gray-200); display: flex; align-items: center; justify-content: space-between; }
.card-header h3 { font-size: 15px; font-weight: 600; }
.card-body { padding: 20px; }

/* ===== STAT CARDS ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--border-radius); padding: 20px; display: flex; align-items: center; gap: 16px; box-shadow: var(--shadow); }
.stat-icon { width: 48px; height: 48px; border-radius: var(--border-radius); display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
.stat-icon.green { background: #dcfce7; color: var(--success); }
.stat-icon.blue { background: #dbeafe; color: var(--info); }
.stat-icon.orange { background: #fef3c7; color: var(--warning); }
.stat-icon.red { background: #fee2e2; color: var(--danger); }
.stat-icon.black { background: var(--gray-100); color: var(--black); }
.stat-value { font-size: 24px; font-weight: 700; color: var(--black); }
.stat-label { font-size: 12px; color: var(--gray-500); font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; }

/* ===== BUTTONS ===== */
.btn { display: inline-flex; align-items: center; gap: 7px; padding: 8px 16px; border-radius: var(--border-radius); font-size: 13.5px; font-weight: 500; cursor: pointer; border: 1px solid transparent; text-decoration: none; transition: all 0.15s; white-space: nowrap; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 10px 20px; font-size: 15px; }
.btn-black { background: var(--black); color: var(--white); border-color: var(--black); }
.btn-black:hover { background: #222; }
.btn-white { background: var(--white); color: var(--black); border-color: var(--gray-300); }
.btn-white:hover { background: var(--gray-50); }
.btn-success { background: var(--success); color: var(--white); border-color: var(--success); }
.btn-success:hover { background: #15803d; }
.btn-danger { background: var(--danger); color: var(--white); border-color: var(--danger); }
.btn-danger:hover { background: #b91c1c; }
.btn-warning { background: var(--warning); color: var(--white); border-color: var(--warning); }
.btn-info { background: var(--info); color: var(--white); border-color: var(--info); }
.btn-outline { background: transparent; color: var(--black); border-color: var(--gray-300); }
.btn-outline:hover { background: var(--gray-100); }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== FORMS ===== */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 13px; font-weight: 600; color: var(--gray-700); }
.form-control { padding: 9px 12px; border: 1px solid var(--gray-300); border-radius: var(--border-radius); font-size: 13.5px; background: var(--white); color: var(--black); width: 100%; transition: border-color 0.15s; }
.form-control:focus { outline: none; border-color: var(--black); }
.form-control[readonly] { background: var(--gray-100); color: var(--gray-500); }
select.form-control { cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 80px; }
.form-hint { font-size: 11px; color: var(--gray-400); }

/* ===== TABLE ===== */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
thead th { background: var(--gray-50); color: var(--gray-700); font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; padding: 10px 14px; text-align: left; border-bottom: 2px solid var(--gray-200); white-space: nowrap; }
tbody td { padding: 10px 14px; border-bottom: 1px solid var(--gray-200); color: var(--black); vertical-align: middle; }
tbody tr:hover { background: var(--gray-50); }
tbody tr:last-child td { border-bottom: none; }
.table-img { width: 38px; height: 38px; object-fit: cover; border-radius: var(--border-radius); border: 1px solid var(--gray-200); }

/* ===== BADGES ===== */
.badge { display: inline-flex; align-items: center; padding: 3px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-success { background: #dcfce7; color: var(--success); }
.badge-danger { background: #fee2e2; color: var(--danger); }
.badge-warning { background: #fef3c7; color: var(--warning); }
.badge-info { background: #dbeafe; color: var(--info); }
.badge-gray { background: var(--gray-200); color: var(--gray-700); }
.badge-black { background: var(--black); color: var(--white); }

/* ===== ALERTS ===== */
.alert { padding: 12px 16px; border-radius: var(--border-radius); margin-bottom: 16px; font-size: 13.5px; display: flex; align-items: center; gap: 10px; border: 1px solid; }
.alert-success { background: #f0fdf4; border-color: #bbf7d0; color: var(--success); }
.alert-danger { background: #fef2f2; border-color: #fecaca; color: var(--danger); }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: var(--warning); }
.alert-info { background: #eff6ff; border-color: #bfdbfe; color: var(--info); }

/* ===== MODAL ===== */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 200; align-items: center; justify-content: center; padding: 20px; }
.modal-overlay.open { display: flex; }
.modal { background: var(--white); border-radius: 10px; box-shadow: 0 20px 50px rgba(0,0,0,0.15); width: 100%; max-width: 550px; max-height: 90vh; overflow-y: auto; }
.modal-lg { max-width: 750px; }
.modal-header { padding: 18px 24px; border-bottom: 1px solid var(--gray-200); display: flex; align-items: center; justify-content: space-between; }
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--gray-500); line-height: 1; padding: 2px 6px; }
.modal-close:hover { color: var(--black); }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--gray-200); display: flex; justify-content: flex-end; gap: 10px; }

/* ===== POS SPECIFIC ===== */
.pos-layout { display: grid; grid-template-columns: 1fr 380px; gap: 20px; height: calc(100vh - 130px); }
.pos-products { overflow-y: auto; }
.pos-cart { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--border-radius); display: flex; flex-direction: column; overflow: hidden; }
.pos-search-bar { position: sticky; top: 0; background: var(--gray-100); z-index: 10; padding-bottom: 14px; }
.pos-search-bar .form-control { font-size: 15px; padding: 11px 14px; }
.pos-filter-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.filter-btn { padding: 6px 14px; border-radius: 20px; border: 1px solid var(--gray-300); background: var(--white); font-size: 12px; cursor: pointer; transition: all 0.15s; font-weight: 500; }
.filter-btn.active, .filter-btn:hover { background: var(--black); color: var(--white); border-color: var(--black); }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
.product-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--border-radius); padding: 12px; cursor: pointer; transition: all 0.15s; text-align: center; }
.product-card:hover { border-color: var(--black); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.product-card.out-of-stock { opacity: 0.5; cursor: not-allowed; }
.product-card img { width: 70px; height: 70px; object-fit: cover; border-radius: var(--border-radius); margin-bottom: 8px; }
.product-card .no-img { width: 70px; height: 70px; background: var(--gray-100); border-radius: var(--border-radius); display: flex; align-items: center; justify-content: center; font-size: 26px; margin: 0 auto 8px; color: var(--gray-400); }
.product-card h4 { font-size: 12.5px; font-weight: 600; margin-bottom: 4px; line-height: 1.3; }
.product-card .sku { font-size: 10px; color: var(--gray-400); margin-bottom: 4px; }
.product-card .price { font-size: 15px; font-weight: 700; }
.product-card .stock { font-size: 11px; color: var(--gray-400); }
.product-card.low-stock .stock { color: var(--warning); }

/* Cart */
.cart-header { padding: 14px 16px; border-bottom: 1px solid var(--gray-200); font-weight: 700; font-size: 15px; display: flex; align-items: center; justify-content: space-between; }
.cart-items { flex: 1; overflow-y: auto; }
.cart-item { display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-bottom: 1px solid var(--gray-200); }
.cart-item-info { flex: 1; min-width: 0; }
.cart-item-info h4 { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cart-item-info small { color: var(--gray-400); font-size: 11px; }
.cart-qty-ctrl { display: flex; align-items: center; gap: 6px; }
.qty-btn { width: 24px; height: 24px; border: 1px solid var(--gray-300); background: var(--white); border-radius: 4px; cursor: pointer; font-size: 15px; display: flex; align-items: center; justify-content: center; transition: all 0.15s; }
.qty-btn:hover { background: var(--black); color: var(--white); border-color: var(--black); }
.qty-display { width: 32px; text-align: center; font-weight: 700; font-size: 13px; }
.cart-item-price { font-weight: 700; font-size: 13px; min-width: 55px; text-align: right; }
.cart-remove { color: var(--danger); cursor: pointer; background: none; border: none; font-size: 14px; padding: 2px; }

.cart-footer { border-top: 1px solid var(--gray-200); padding: 14px 16px; }
.cart-total-row { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 13px; }
.cart-total-row.grand { font-size: 17px; font-weight: 700; padding-top: 8px; border-top: 1px solid var(--gray-200); margin-top: 6px; }
.cart-total-row input { width: 100px; text-align: right; }
.cart-actions { margin-top: 14px; display: flex; gap: 8px; }
.cart-actions .btn { flex: 1; justify-content: center; }

/* Payment section */
.payment-section { padding: 12px 16px; border-top: 1px solid var(--gray-200); background: var(--gray-50); }
.payment-tabs { display: flex; gap: 6px; margin-bottom: 12px; }
.pay-tab { flex: 1; padding: 8px; border: 1px solid var(--gray-300); border-radius: var(--border-radius); background: var(--white); cursor: pointer; font-size: 12.5px; font-weight: 600; text-align: center; transition: all 0.15s; }
.pay-tab.active { background: var(--black); color: var(--white); border-color: var(--black); }
.pay-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; font-size: 13px; }
.pay-row input { width: 110px; padding: 6px 8px; border: 1px solid var(--gray-300); border-radius: var(--border-radius); text-align: right; font-size: 13px; }

/* Empty cart */
.cart-empty { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--gray-400); gap: 10px; padding: 30px; text-align: center; }
.cart-empty i { font-size: 40px; }

/* ===== INVOICE PRINT ===== */
@media print {
  .no-print { display: none !important; }
  body { background: white; }
  .invoice-print { box-shadow: none; border: none; }
}
.invoice-print { max-width: 800px; margin: 0 auto; background: white; padding: 40px; }
.invoice-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 30px; padding-bottom: 20px; border-bottom: 2px solid var(--black); }
.invoice-logo { max-width: 120px; max-height: 80px; object-fit: contain; }
.invoice-title { font-size: 32px; font-weight: 900; letter-spacing: -1px; }
.invoice-meta { margin-bottom: 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.invoice-table th { background: var(--black); color: var(--white); }
.invoice-total { margin-top: 20px; display: flex; justify-content: flex-end; }
.invoice-total table { width: 280px; }
.invoice-total td { padding: 6px 10px; border-bottom: 1px solid var(--gray-200); }
.invoice-total tr.grand-total td { font-weight: 700; font-size: 16px; border-top: 2px solid var(--black); }

/* ===== REPORTS ===== */
.report-filters { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--border-radius); padding: 16px 20px; margin-bottom: 20px; display: flex; gap: 14px; align-items: flex-end; flex-wrap: wrap; }
.report-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 20px; }

/* ===== PAGINATION ===== */
.pagination { display: flex; gap: 6px; align-items: center; padding: 16px 20px; border-top: 1px solid var(--gray-200); }
.page-btn { padding: 6px 12px; border: 1px solid var(--gray-300); border-radius: var(--border-radius); background: var(--white); cursor: pointer; font-size: 13px; text-decoration: none; color: var(--black); }
.page-btn.active, .page-btn:hover { background: var(--black); color: var(--white); border-color: var(--black); }

/* ===== SEARCH BOX ===== */
.search-box { position: relative; }
.search-box i { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--gray-400); }
.search-box input { padding-left: 34px; }

/* ===== CATEGORY IMAGE ===== */
.cat-img-wrap { position: relative; width: 80px; height: 80px; }
.cat-img-wrap img { width: 80px; height: 80px; object-fit: cover; border-radius: var(--border-radius); border: 1px solid var(--gray-200); }
.cat-img-placeholder { width: 80px; height: 80px; background: var(--gray-100); border-radius: var(--border-radius); display: flex; align-items: center; justify-content: center; color: var(--gray-400); font-size: 28px; border: 1px solid var(--gray-200); }

/* ===== LOGIN PAGE ===== */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--gray-100); }
.login-card { background: var(--white); border-radius: 10px; box-shadow: var(--shadow-md); padding: 40px; width: 100%; max-width: 380px; }
.login-logo { text-align: center; margin-bottom: 28px; }
.login-logo i { font-size: 40px; }
.login-logo h1 { font-size: 22px; font-weight: 800; margin-top: 8px; }
.login-logo p { color: var(--gray-400); font-size: 13px; }

/* ===== MISC ===== */
.divider { border: none; border-top: 1px solid var(--gray-200); margin: 20px 0; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--gray-500); }
.text-bold { font-weight: 700; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-12 { margin-top: 12px; }
.mt-20 { margin-top: 20px; }
.mb-16 { margin-bottom: 16px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.w-full { width: 100%; }
.img-preview { width: 80px; height: 80px; object-fit: cover; border-radius: var(--border-radius); border: 1px solid var(--gray-200); display: none; }

/* Responsive */
@media (max-width: 900px) {
  .pos-layout { grid-template-columns: 1fr; height: auto; }
  .pos-cart { max-height: 500px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .stats-grid { grid-template-columns: 1fr; }
  .content-area { padding: 16px; }
}